Integrated Sports announced today that it will distribute the September 12th “Undefeated Champions” pay per view event, featuring a pair of World Boxing Organization title fights, live in the United States from the Coliseum of Puerto Rico in San Juan. WBO light flyweight champion Ivan “Iron Boy” Calderon (32-0-1, 6 KOs) headlines in a 12-round bout in a rematch against No. 1 contender Rodel “Kid Rapido” Mayol (25-3-1, 19 KOs). This past June’s Calderon-Mayol in Madison Square Garden ended in a six-round technical draw because Ivan was unable to continue from an accidental head butt he suffered in the fourth round.

In the 12-round co-feature, WBO super featherweight title-holder Roman “Rocky” Martinez (22-0-1, 13 KOs) makes his first title defense, since capturing the belt March 14 by way of a fourth-round stoppage of Nicky Cook, versus former world title challenger Michael Lozado (31-5-1, 24 KOs).

“Undefeated Champions” is being distributed in the United States by Integrated Sports for live viewing at 9 PM/ET – 6 PM/PT on cable and satellite pay-per-view via iN Demand and DirecTV for a suggested retail price of only $29.95.

“We’re excited to be distributing this great boxing card in the United States,” Integrated Sports president Doug Jacobs said. “Four of the best lighter weight-class fighters in the world will be in action. Calderon-Mayol I was an entertaining, bloody war until it was stopped and ‘Rocky’ Martinez showed the boxing world how good he is when he blew out Cook. The rich, passioante Puerto Rican (Calderon)-Filopino (Mayol) and Puerto Rican (Martinez)-Mexican (Lozado) rivalry traditions will continue September 12th. We believe boxing fans all over the United States, especially on the East Coast where so many Puerto Ricans live, will embrace this pay per view card.”